WO2017010308A1 - Fil électrique équipé de résine moulée et procédé de production de fil électrique équipé de résine moulée - Google Patents

Fil électrique équipé de résine moulée et procédé de production de fil électrique équipé de résine moulée Download PDF

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Publication number
WO2017010308A1
WO2017010308A1 PCT/JP2016/069577 JP2016069577W WO2017010308A1 WO 2017010308 A1 WO2017010308 A1 WO 2017010308A1 JP 2016069577 W JP2016069577 W JP 2016069577W WO 2017010308 A1 WO2017010308 A1 WO 2017010308A1
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WO
WIPO (PCT)
Prior art keywords
wire
terminal
electric wire
smooth
mold
Prior art date
Application number
PCT/JP2016/069577
Other languages
English (en)
Japanese (ja)
Inventor
大輔 橋本
康治 福本
俊哉 廣岡
知聖 金
宮本　賢次
満 廣瀬
仁志 堀尾
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Priority to US15/740,105 priority Critical patent/US10065342B2/en
Priority to CN201680036461.1A priority patent/CN107735907B/zh
Priority to JP2017528380A priority patent/JP6409973B2/ja
Publication of WO2017010308A1 publication Critical patent/WO2017010308A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14639—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles for obtaining an insulating effect, e.g. for electrical components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12—End pieces terminating in an eye, hook, or fork
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/20—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for assembling or disassembling contact members with insulating base, case or sleeve
    • H01R43/24—Assembling by moulding on contact members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B29C2045/14139—Positioning or centering articles in the mould positioning inserts having a part extending into a positioning cavity outside the mould cavity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/36—Plugs, connectors, or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/021—Soldered or welded connections between two or more cables or wires
    • H01R4/022—Soldered or welded connections between two or more cables or wires comprising preapplied solder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H01R43/0214—Resistance welding

Definitions

  • This invention relates to a technique for manufacturing an electric wire with molded resin.
  • Patent Document 1 discloses an electric wire with a terminal provided with a waterproof resin portion.
  • the waterproof resin portion is a portion formed by insert molding, and is formed so as to cover from the portion of the insulation coating of the insulated wire to the connection portion of the metal terminal with the core wire portion of the insulated wire.
  • the terminal connection part is arranged inside the mold for insert molding, and a bare lead wire extending from the terminal connection part is inserted into the mold.
  • the resin is filled into the mold while being exposed to the outside through the opening.
  • a gap is formed between the opening of the mold for insert molding and the conductor, and the resin inside the mold may leak out of the mold from the gap. was there.
  • an object of the present invention is to provide a technique for reducing leakage of resin inside a mold for insert molding to the outside of the mold when molding resin is formed on a lead wire with a terminal.
  • a first aspect is a molded resin-attached electric wire, and a terminal connected to one end portion of the conductive wire via a conductive wire formed of a conductive metal and a terminal connection portion And a mold resin that covers the terminal connection portion of the lead wire with the terminal, and the conductive wire has a smooth portion with a smooth outer peripheral surface at a position away from the terminal connection portion on the other side. And the said mold resin covers the inside of the range from the said terminal connection part to the said smooth part in the said conducting wire with a terminal.
  • the second aspect is a molded resin-attached electric wire according to the first aspect, wherein the conducting wire is composed of a plurality of metal strands bundled together.
  • the third aspect is a molded resin-attached electric wire according to the second aspect, wherein the smooth portion is a portion in which the plurality of metal strands are melted and solidified.
  • a 4th aspect is an electric wire with a mold resin which concerns on a 2nd aspect, Comprising:
  • the said metal strand which comprises the said conducting wire is the core part formed with the 1st metal, and at least one part of the said core wire
  • the fifth aspect is an electric wire with a mold resin according to the fourth aspect, and in the inner part of the smooth part, the space between the adjacent core parts is filled with the molten solidified product of the plated part.
  • a sixth aspect is a molded resin-attached electric wire according to any one of the first to fifth aspects, and the smooth portion has a circular cross-sectional shape.
  • the seventh aspect is a molded resin-attached electric wire according to any one of the first to sixth aspects, and is a non-conductive heat-shrinkable tube that covers the outside of the conductive wire exposed from the mold resin, Is further provided.
  • an eighth aspect is an electric wire with a molded resin according to any one of the first to seventh aspects, wherein the mold resin is formed so as to hold a plurality of the terminal-attached conductors in a parallel state. Has been.
  • the ninth aspect is a method for manufacturing a molded resin-attached electric wire, and (a) With a terminal in which a terminal is connected to one end of a conductive wire formed of a conductive metal via a terminal connection portion.
  • the smooth portion of the conducting wire is in contact with the opening of the insert molding die, so that a gap is formed between the opening of the die and the conducting wire. What can be done can be reduced. Thereby, it is possible to reduce the leakage of the resin from the inside of the insert molding die to the outside through the gap of the opening.
  • the resin can be prevented from leaking from the insert mold when forming the mold resin.
  • the gap between the metal strands can be filled by making the smooth portion a portion in which a plurality of metal strands are melted and solidified. For this reason, hardness can be increased compared with before integration.
  • the outer peripheral surface of the conducting wire can be smoothed by melting and solidifying the second metal covering the metal strand.
  • the resin inside the insert molding die is inserted between the core wire portions when the mold resin is insert-molded. Leakage to the outside of the mold for insert molding through the gap can be suppressed.
  • the cross-sectional shape of the smooth portion by making the cross-sectional shape of the smooth portion circular, it is not necessary to consider the circumferential direction of the lead wire with terminal when forming the smooth portion on the lead wire. For this reason, the work efficiency which forms a smooth part improves. Moreover, even when a slight twist occurs in the conductor of the lead wire with the terminal when the mold resin is insert-molded, the smooth portion can be easily installed in the opening of the insert mold without correcting the twist. For this reason, the work efficiency which forms mold resin improves.
  • the conductive wire can be insulated and protected by retrofitting the non-conductive heat-shrinkable tube to the bare conductor.
  • a plurality of lead wires with terminals can be held by one mold resin.
  • Drawing 1 is a top view showing electric wire 1 with a mold resin concerning a 1st embodiment.
  • FIG. 2 is a side view showing the terminal-attached conductor 10 constituting the molded resin-attached electric wire 1 according to the first embodiment.
  • the mold resins 20 and 20 and the heat-shrinkable tube 30 are shown in a cross-sectional view.
  • the molded resin-attached electric wire 1 is composed of a plurality (here, three) of conductor wires with terminals 10, a pair of mold resins 20, 20, and a plurality of (here, three) heat shrinks covering the conductor wires 12 of each of the conductor wires with terminals 10. Tube 30.
  • the electric wire 1 with a molded resin can be used for a circuit that connects an inverter and a motor in an electric vehicle or a hybrid vehicle, for example.
  • the lead wire 10 with a terminal is composed of a lead wire 12 and a metal terminal 14 electrically connected to a terminal portion of the lead wire 12 via a terminal connection portion 141.
  • the crimping piece of the metal terminal 14 crimped to the conducting wire 12 constitutes the terminal connection portion 141.
  • the terminal connection part 141 is not limited to what crimped
  • the conducting wire 12 is configured as a metal wire in which a plurality of metal strands 13 made of a conductive metal such as copper, copper alloy, aluminum, and aluminum alloy are twisted and bundled into one.
  • the conducting wire 12 is not limited to one in which a plurality of metal strands 13 are twisted together.
  • the conductive wire 12 may be a metal wire (braided wire) knitted by combining a plurality of metal strands 13.
  • Each metal strand 13 covers a core wire portion 131 made of a conductive metal (first metal) and the outside of the core wire portion 131, and a metal (first metal) forming the core wire portion 131.
  • a plated portion 133 made of a metal having a lower melting point (second metal) (see FIG. 5).
  • the conducting wire 12 has a smoothing portion 16 whose outer peripheral surface is smoother than other portions of the conducting wire 12 at a position away from the terminal connecting portion 141 of the metal terminal 14 attached to one end portion on the other side. is doing.
  • two terminal connection portions 141 and 141 are provided at both end portions of the conducting wire 12, and two smoothing portions 16 and 16 are formed inside them.
  • the smoothing part 16 is a part of the conducting wire 12 formed by hot pressing, as will be described later.
  • the metal terminal 14 is a part formed by pressing a metal plate of copper, copper, copper alloy, aluminum, aluminum alloy or the like.
  • a through hole 143 having a circular opening is formed at the tip of the metal terminal 14, and a bolt is inserted through the through hole 143 to be electrically connected to the mating connection member.
  • the mold resin 20 is formed in a long shape, and is a member that holds the conductors 12 in a parallel state at both ends of the plurality of conductors 12.
  • the mold resin 20 is a synthetic resin or natural resin portion formed by die molding (insert molding) using the end portion of the conducting wire 12 and the base end portion of the metal terminal 14 as insert parts.
  • the plurality of conductive wires 12 extend in parallel from one side of the mold resin 20, and the tips of the plurality of metal terminals 14 are exposed from the opposite side.
  • the shape of the mold resin 20 is not limited to that shown in FIG. 1.
  • the shape of the mold resin 20 is arbitrary depending on the shape or connection method of the mating connection member to which the wire 1 with mold resin is connected. May be changed.
  • one mold resin 20 holds a plurality of lead wires 10 with terminals, but may hold only one lead wire 10 with terminals.
  • the heat-shrinkable tube 30 is obtained by cooling a resin member formed into a tubular shape by extrusion after being stretched into a thick tubular shape while being heated.
  • the heat-shrinkable tube 30 thus obtained has a shape memory characteristic that, when heated, contracts to a thin tubular shape before being stretched.
  • the heat-shrinkable tube 30 is heated, the heat-shrinkable tube 30 is contracted into a shape corresponding to the outer shape of the conducting wire 12 and attached to the conducting wire 12.
  • the heat-shrinkable tube 30 is made of a non-conductive material, and covers the outside of the bare conducting wire 12 to insulate the conducting wire 12 and protect the conducting wire 12 from the outside.
  • the heat contraction tube 30 may cover the outer side of the conducting wire 12 in a state where a gap is provided between the conducting wire 12.
  • Drawing 3 is an explanatory view showing the manufacturing process of electric wire 1 with mold resin concerning a 1st embodiment.
  • FIG. 4 is an explanatory view showing a state in which the smooth portion 16 is formed on the conducting wire 12.
  • FIG. 5 is a schematic cross-sectional view partially showing the conductive wire 12 before and after the smooth portion 16 is formed.
  • the terminal-attached conductor 10 in which the metal terminal 14 is connected to the both ends of the bare conductor 12 that is not covered with the insulating coating via the terminal connector 141 is prepared (preparation step S1).
  • the smoothing portion 16 is formed at a position away from the terminal connecting portion 141 in the bare conducting wire 12 of the conducting wire with terminal 10 (smoothing portion forming step S2).
  • two smoothing portions 16 and 16 are formed at positions away from the respective terminal connection portions 141 of the conducting wire 12.
  • the cross-sectional shape of each of the smooth portions 16 and 16 is a circle.
  • the diameter of each smooth part 16 and 16 is smaller than the diameter of the part (for example, intermediate part between a pair of smooth parts 16 and 16) in which the smooth part 16 of the conducting wire 12 is not formed.
  • the cross-sectional shape of the smooth part 16 is desirably a perfect circle in accordance with the shape of the opening of the mold resin 20 described later, it is not always necessary to be a perfect circle.
  • the smoothing part 16 should just be formed so that the clearance gap which the filled resin leaks may not generate
  • the smoothing portion 16 is formed by heat-pressing a corresponding portion of the conducting wire 12 using the smoothing portion forming mold 4.
  • the smooth part forming mold 4 includes a lower mold 41 and an upper mold 43.
  • a recess 411 is formed in which a part of the conducting wire 12 where the smooth portion 16 is formed is accommodated.
  • the bottom of the recess 411 forms a concave surface 413 that is recessed in a semicircular arc when viewed in cross section.
  • the size (radius) of the semicircular arc formed by the concave surface 413 substantially matches the size (radius) of the outer shape of the smooth portion 16.
  • a convex portion 431 that can be inserted into the concave portion 411 is formed at the center of the lower surface of the upper mold 43.
  • the tip of the convex portion 431 forms a concave surface 433 that is recessed in a semicircular arc shape in a cross-sectional view.
  • the size (radius) of the semicircular arc formed by the concave surface 433 also substantially matches the size (radius) of the outer shape of the smooth portion 16.
  • each of the lower mold 41 and the upper mold 43 has heat sources 415 and 435 incorporated therein.
  • the heat source 415 of the lower mold 41 raises the surface temperature of the concave surface 413 in contact with the conducting wire 12 by heating the entire lower mold 41.
  • the heat source 435 of the upper mold 43 raises the surface temperature of the concave surface 433 in contact with the conducting wire 12 by heating the entire upper mold 43.
  • the heat sources 415 and 435 may be configured to locally increase the surface temperature of the concave surfaces 413 and 433 instead of the entire lower mold 41 and the entire upper mold 43.
  • the surface temperature of the concave surfaces 413 and 433 is heated to a temperature lower than the melting point of the core wire part 131 and higher than the melting point of the plating part 133.
  • the temperature is lower than the melting point of copper (1085 ° C.) and higher than the melting point of tin (231.9 ° C.). For example, it is heated to 300 ° C.
  • the cross section of the conducting wire 12 before being hot-pressed is covered with a plating portion 133 on the outer side of the core portion 131 of each metal strand 13.
  • a slight gap exists between the metal wires 13.
  • the outer peripheral surface of the conducting wire 12 forms an uneven surface by a gap between adjacent metal strands 13.
  • the conductive wire 12 having such an outer shape is heated and pressed by the concave surfaces 413 and 433 heated to the above temperature, and the conductive wire 12 is taken out from the lower mold 41 and cooled, thereby being smoothed as shown in the lower side of FIG. Part 16 is formed.
  • the molten solidified product 135 (second metal product) obtained by melting and solidifying the plated portion 133 of each metal wire 13 is between the adjacent metal wires 13 (specifically, adjacent core wires). Between the portions 131).
  • the gap is filled by the molten solidified product 135 (second metal product) of the plating portion 133 being interposed between the adjacent core wire portions 131.
  • the outer peripheral surface 161 of the smoothing portion 16 is pressurized by the concave surfaces 413 and 433, the outer peripheral surface is smoothed into a circular shape.
  • the gap between the adjacent core wire portions 131 is filled with the molten solidified product 135 of the plating portion 133.
  • the gap between the core wire portions 131 is filled in the inner portion of the smooth portion 16, and at least the outer peripheral surface 161 of the smooth portion 16 may be smoothed. Further, it is not essential that all the gaps between the core wire portions 131 are filled in the inner portion of the smooth portion 16, and may be partially filled.
  • the smooth portion 16 may be formed by locally heating a part of the conductive wire 12 forming the smooth portion 16 and then applying pressure with the lower die 41 and the upper die 43 in which the heat sources 415 and 435 are omitted.
  • insert molding of the mold resin 20 is performed using the terminal connection portion 141 of the terminal-attached conductor 10 as an insert portion.
  • Insert molding step S3 the metal mold
  • the terminal connection portion 141 of the lead wire 10 is inserted into the mold 5, and the lead wire 12 extending from the terminal connection portion 141 is exposed to the outside of the mold 5. In this state, resin is filled into the mold 5 (filling step).
  • the mold 5 is configured by combining the upper mold 53 with the upper part of the lower mold 51.
  • the concave surface formed inside the mold 5 is such that the molded resin 20 after molding matches the outer shape.
  • the lower mold 51 is formed with a concave surface into which the tip of the metal terminal 14 is fitted, and the tip of the metal terminal 14 can be positioned. When the metal terminal 14 is sandwiched between the concave surface and the lower surface of the upper mold 53, the metal terminal 14 and thus the terminal-attached conductor 10 are held.
  • an opening 55 for passing the lead wire 12 extending from the terminal connection portion 141 to the outside of the die 5 is formed on one side portion of the die 5.
  • the opening 55 is a portion formed by combining the semi-cylindrical concave surface formed in the lower mold 51 and the semi-cylindrical concave surface of the upper mold 53 vertically.
  • the opening 55 forms a communication path that connects the space (cavity) surrounded by the concave surface for molding the mold resin of the mold 5 and the outside of the mold 5.
  • the opening shape of the opening 55 is a shape corresponding to the outer shape of the smooth portion 16 of the conducting wire 12 (here, circular).
  • the length (thickness) of the opening 55 in the central axis direction is shorter than the length of the smoothing portion 16 in the central axis direction. For this reason, the inner peripheral surface of the opening 55 is in contact with the inner portion of the smoothing portion 16, and the end of the smoothing portion 16 on the one metal terminal 14 side is disposed in the cavity of the mold 5. Therefore, the end of the smooth portion 16 is covered with the mold resin 20 formed by insert molding.
  • the smoothing portion 16 Since the outer peripheral surface 161 of the smoothing portion 16 is formed smoothly and the opening shape of the opening 55 is a shape corresponding to the outer shape of the smoothing portion 16, the smoothing portion 16 is in relation to the opening 55. Can be contacted with almost no gap. For this reason, when the resin is filled in the mold 5, it is possible to suppress leakage to the outside of the mold 5 through the gap between the opening 55 and the smooth portion 16.
  • the length (thickness) of the opening 55 of the mold 5 in the central axis direction may substantially match the length of the smoothing portion 16 in the central axis direction.
  • the smooth part 16 is formed in a smaller diameter than the other part of the conducting wire 12, the conducting wire 12 can be positioned by fitting the opening 55 into the smoothing part 16 having substantially the same length. .
  • the opening width (here, the diameter) of the opening 55 is slightly smaller than the width (here, the diameter) of the smooth portion 16.
  • the opening 55 pressurizes the smoothing section 16, so that the smoothing section 16 is compressed to the size of the opening 55. This can further suppress the formation of a gap between the opening 55 and the smooth portion 16.
  • the cross-sectional shape of the smoothing portion 16 and the opening shape of the opening portion 55 are circular, but other shapes (an elliptical shape, an oval shape, or a polygonal shape) may be used.
  • the smooth portion 16 can be installed in the opening 55 without completely returning the twist. Therefore, workability is improved.
  • the effect of improving work efficiency is remarkable.
  • the upper mold 53 is removed from the lower mold 51, and the lead wire 10 with terminal on which the mold resin 20 is formed is taken out.
  • the mold resin 20 is formed on the outside of the lead wire 10 with the terminal from the end of the metal terminal 14 to the end of the smoothing portion 16 on the metal terminal 14 side of the terminal connection portion 141. It is formed so as to cover.
  • insert molding of the mold resin 20 is performed in the same manner on the opposite side of the lead wire 10 with terminal.
  • FIG. 6 is an explanatory view showing a state in which the heat-shrinkable tube 30 is attached to the bare conducting wire 12.
  • the mold resins 20 and 20 on both sides are shown in a sectional view.
  • the heat-shrinkable tube 30 before shrinkage is arranged so as to cover the outside of the portion from one smoothing portion 16 to the other smoothing portion 16 of the conductive wire 12 exposed from the mold resins 20, 20. .
  • the heat-shrinkable tube 30 is contracted to a shape corresponding to the outer shape of the conducting wire 12 by being heated by the heaters 6 and 6 disposed above and below.
  • the portion of the heat-shrinkable tube 30 that covers the smooth portions 16 and 16 and the portion of the conductive wire 12 that covers the portions other than the smooth portions 16 and 16 are illustrated to have the same outer shape. However, you may make it dent in the part which covers the smooth parts 16 and 16.
  • FIG. 7 is a schematic cross-sectional view partially showing the conductive wire 12a before and after the formation of the smooth portion 16a according to the second embodiment.
  • the smooth part 16a of this embodiment is a part formed by resistance welding.
  • each of the metal strands 13a constituting the conducting wire 12a may be composed only of a conductive metal wire that is not metal-plated.
  • the conductive wire 12a formed by twisting a plurality of metal strands 13a is used as a concave surface of the lower die 41 and the upper die 43 of the smooth portion forming die 4 shown in FIG. While compressing at 413 and 433, it is performed by flowing current through the plurality of metal wires 13a.
  • the smooth portion 16a can be formed by flowing a current for an extremely short time (for example, several microseconds). Therefore, the processing time can be shortened.
  • the smooth portion 16a formed by resistance welding is an integrated portion by melting and solidifying a plurality of metal strands 13a. For this reason, the gap between the adjacent metal wires 13 that existed before resistance welding is filled.
  • the hardness of the conducting wire 12 a after resistance welding can be increased before resistance welding (that is, before integration of the plurality of metal strands 13).
  • the outer peripheral surface 161a of the smooth portion 16a can be formed smoothly.
  • the heat contraction tube 30 is employ
  • another aspect may be employ
  • a mode in which a non-conductive tape is wound around the conductive wire 12 or a mode in which one or a plurality of conductive wires 12 are covered with a non-conductive sheet-like member may be employed.
  • the core wire portion 131 that is metal-plated by the plating portion 133 is employed as the metal strand 13.
  • the metal strand may be composed only of a conductive metal wire that is not metal-plated, or may be the metal strand 13 in which a part of the core wire portion 131 is metal-plated.
  • the heating press may be performed at a temperature higher than the melting point of the metal wire.
  • the conducting wire 12 is not limited to what bundled the some metal strand 13 in one.
  • it may be a single metal wire formed of a conductive metal.
  • the smooth part 16 is formed by heat-pressing the conducting wire 12.
  • the heating of the conducting wire 12 may be omitted, and the smooth portion 16 may be formed by pressing the conducting wire 12.
  • a smooth portion having a smooth outer peripheral surface may be formed by attaching another member having a smooth outer peripheral surface to the conducting wire 12.
  • another member for example, it is conceivable to employ a tape material that can be wound around and fixed to the conducting wire 12, or an annular member made of resin or metal.
  • the smooth portion may be thicker than the portion other than the smooth portion of the conductive wire 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Insulated Conductors (AREA)

Abstract

L'objectif de la présente invention est de réduire la fuite d'une résine contenue à l'intérieur d'un moule de moulage par insertion vers l'extérieur du moule lors de la formation d'une résine moulée sur un fil conducteur équipé de bornes. L'invention comprend une étape consistant à former, dans un fil conducteur 12 d'un fil conducteur 10 équipé de bornes, une partie lisse 16 dont la surface périphérique extérieure 161 est lisse au niveau d'une position de l'autre côté par rapport à une partie de connexion de borne 141 et séparée de celle-ci (étape de formation de partie lisse S2). En outre, l'invention comprend en outre une étape consistant à former une résine moulée 20 recouvrant la partie de connexion de bornes 141 dans un état dans lequel la partie de connexion de borne 141 du fil conducteur 10 équipé de bornes dans lequel la partie lisse 16 a été formée est insérée dans le moule de moulage par insertion 5, et le fil conducteur 12 s'étendant à partir d'une borne métallique est exposé par une partie d'ouverture 55 du moule 5 sur l'extérieur (étape de moulage par insertion S3). La forme externe de la partie lisse 16 est une forme correspondant à la forme de l'ouverture dans la partie d'ouverture 55 du moule 5. Lors de l'étape de moulage par insertion S3, la résine est versée dans le moule 5 dans un état dans lequel la surface périphérique interne de la partie d'ouverture 55 du moule 5 est en contact avec la surface périphérique extérieure 161 de la partie lisse 16.
PCT/JP2016/069577 2015-07-10 2016-07-01 Fil électrique équipé de résine moulée et procédé de production de fil électrique équipé de résine moulée WO2017010308A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US15/740,105 US10065342B2 (en) 2015-07-10 2016-07-01 Molded resin-equipped electric wire and molded resin-equipped electric wire production method
CN201680036461.1A CN107735907B (zh) 2015-07-10 2016-07-01 带树脂模塑件的电线及带树脂模塑件的电线的制造方法
JP2017528380A JP6409973B2 (ja) 2015-07-10 2016-07-01 モールド樹脂付電線及びモールド樹脂付電線の製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-138407 2015-07-10
JP2015138407 2015-07-10

Publications (1)

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WO2017010308A1 true WO2017010308A1 (fr) 2017-01-19

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PCT/JP2016/069577 WO2017010308A1 (fr) 2015-07-10 2016-07-01 Fil électrique équipé de résine moulée et procédé de production de fil électrique équipé de résine moulée

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Country Link
US (1) US10065342B2 (fr)
JP (1) JP6409973B2 (fr)
CN (1) CN107735907B (fr)
WO (1) WO2017010308A1 (fr)

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US10065342B2 (en) 2018-09-04
JP6409973B2 (ja) 2018-10-24
CN107735907B (zh) 2019-07-23
US20180186036A1 (en) 2018-07-05
CN107735907A (zh) 2018-02-23

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